Prewelt cementing and forming machine



Jan. 15, 19460 E. A. HOLMGREN PREWELT CEMENTING AND FORMING MACHINE Filed Jan. 12, 1945 2 Sheets-Sheet 1 12622101" Eric A Hplimgr'en Jan; 15, 1946. E. A. HOLMGREN 7 2,392,849

PREWELT CEMENTING AND FORMING; MACHINE Filed Jan. 12, 1945 2 Sheets-Sheet 2 [1112mm Eric A Holmgren Patented Jan. 15, 1946 PREWELT CEMENTING AND FORMING MACHINE Eric A. Holmgren, Beverly, Mas s., assignor to United Shoe Machinery Corporation, Flemington, N. .L, a corporation of New Jersey Application January 12, 1945, Serial No. 572,445

4 Claims.

' extensively in infants sizes and, prior to the lasting operation, the welt is stitched to the upper in such a position that it lies snugly against the upper and thus renders it dillilcult to present the upper to the lasting instrumentalities for operation thereon. 7 Accordingly, it is customary to pass the welt between pressure rolls which assist in taking out any kinks or wrinkles and which in the performance of this operation draw the upper away from the welt so that the welt will stand out in a plane such as that which it will assume when it is attached to a sole, thus facilitating the presentation of the upper to the wipers of the bed lasting machine, for example. It is also customary to apply to the attaching surface of the welt, as a part of the same operation, a coating of cement which will be utilized for temporarily securing the Welt to the margin of a sole to which it ultimately will be fastened permanently, as by stitches. Commonly, machines for this operation have been provided with coacting feed rolls rotatable upon parallel axesfor engagement with the opposite surfaces of the welt. The end surface of one'of these rolls necessarily engages the outer surface of the upper and in the hands of a careless operator may accidentally scar it, especially around the toe end of the shoe.- With these conditions in mind, it is an object of the invention to provide an improved machine for simultaneously coating the attaching surface of the welt in a prewelt shoe upper prior to the lasting operation and straight ening or flattening the welt.

In accordance with this object, the illustrated machine embodies a coating apparatus to which the welt is presented by means of a frusto-conical roll rotatable about an axis which is nearly vertical so that the base of the inverted cone supports the welt, while the wedge-shaped periphery thereof serves to separate the welt and the upper. Coacting with this mechanism is a worksupporting or molding finger engageable with the insid of the upper to hold the work against the: supporting roll with the latter firmly seated in the welt crease, and this finger iscarried on a slide so that it may be separated from the rolls to facilitate the introduction of a piece of work. An operator-controlled mechanism is provided for moving the slide and, in accordance with an important feature of the invention, is so arranged that, when the slide, and hence the finger, is in its inner, operative position, the operating mechanism locks it there against displacement.

This and other features of the invention will best be understood from a consideration of the following specification taken in connection with the accompanying drawings, in which Fig. 1 is an angular view of the work-engaging parts of the machine;

Fig. 2 is an exploded view of a finger-carrying slide and its guideway;

Fig. 3 is a side elevation of these same parts, showing them in the position which they occupy when engaging a shoe upper, with theslide locked in this position, and

Fig. 4 is aside elevation, with parts broken away and in section, and illustrating the fingercarrying slide as moved to its work-releasing position.

Designed for the treatment of work W including an upper in to which there has been stitched a welt 12, the structure includes a cylindrical cement-applying roll l4 mounted on a driven shaft l6 contained in the frame 18 of a machine of th type illustrated in Letters Patent of the United States No. 2,038,561, granted April 28, 1936, upon the application of J. B. Hadaway. Cement is supplied to the periphery of this roll by a series of rolls, one of which is shown at 20.

Associated with the applying roll I4 is a weltsupporting or feed roll 22 of inverted frustoconical shape which is rotatable about a substantially vertical axis and is supported and driven by a mechanism 24 described in said patent. In order to separate the supporting roll 22 from the applying roll l4 when introducing a piece of work, ther is provided a treadle-controlled cable 26 attached to a pivoted arm 28 which supports the frusto conical roll. As the wedge-shaped periphery of this supporting r011 22 enters the welt crease, it spreads apart the well: l2 and the upper 10 while cooperating with the applying roll 14 to apply pressure to the welt, thereby to take the wrinkles out of it. A guard 29 (Fig. 1) is provided for the front of the roll 22.

It will be seen at once that, in order for the supporting roll to ;be most effective, the workmust be guided against lateral deviation from its intended path, thereby to keep the wedgesh'aped periphery of the supporting roll 22 seated in the welt crease, and this is effected by a molding finger 30 having a rounded end 32 which engages the lining or the inside of the upper (Fig.

be applied to the attaching surface of the welt, the work being held inverted with the welt gripped between the two rolls. As a result, there will be an effective straightening of the welt and a molding of the associated upper into a condisupported in a slideway 44 adiustably carried on theframe l8 of the machine by means of ;a ;curved' arm 45 fastened to 9. depending bracket 48 byra'; screw 49 passing through a vertical slot inthe.

arm. The :bracket is attached to theimachine' frame. The slideway 44 has agroove '5illfor' receiving the slide M), and this groove is deepened at 52 for a purpose which will. later appear. The

slide is held in the slideway by means of cover plates 54 and 56. Movement of the slide to carry the molding finger 39 away ,from the applying rolls, -so as. to facilitate the introduction or removal of,a;pieee ofwprk, is eflected by a crank arm 50 havi a pin 62 entering a vertical groove 64 formed in an upward extension 66 of, the slide. This crank arm 60 is secured by a draw bolt 6! (Fig. 4) to arcckshaft E8 journaledin theside of the slideway above the deepened'portion -52 of the groove andhaving on its outer or near end anarm lfl'normaliy urged in iaaclockwise direction by means of a spring 12 attached' to the frame at one end, and to a pin {H in the 'arm at its other end. This spring'lZris therefore ef-- fective to hold the crank armfil) in the position illustrated in Figs. 1, 2 and 3' so that: itlies in the slideway 64 substantially fatthe bottom of the deepened portion 52 of the groove therein with-its crank. pin 62 in the vertical'grooveifid of the'slide. Inv this position, it is effective, to lockthe ,slide against any force tending to move it outward. The slide 40 has a lateral reces 63' (Fig. 2) to receive the crank arm 60, and the, cover plate .56 is cut away at 65 to allow said arm to emerge from the guidewayasin Fig.4. 7

Operation of the crank arm 58 to movethe slide outward against the tensionof the spring 12 is' eiiected'by means of a slotted arm 16 into gral with 01 secured to a cross shaft. 18 which i journaledgin a lug 80 on the-underside of the guidewayfi i. Thisshaft 18 has, clamped to its far end a lever 82 connected by a chain .84 toa treadle (not shown) such as thelone connected tothe'cable 26.; When the treadleisdepressed thearm it willgberetated counterclockwise, the. crank arm Bil tilted upwardly and the slide. .40 will be; moved to the left. A suitable amount of slack is, provided in; this elattercable in order that the moldingfinger may be moved out of:

engagement, with the workbefore the, feed rolls l4; and 22rare separated-or, conversely, in'crder' that the finger may be brought againstthework before the feed movement'starts. 1

V-In operating the machine, assuming separated manually from the upper; l!) at some. convenient point; and. moved into, position, be-

tween the feed rolls. The treadle' will then be that the treadlehas been depressed, the welt-i l2,wi1l be tion in which the upper will cling to the last and the welt will stand out ready for presentation of theupper 'tojthe lasting machine. As the supporting roll engages successive portions of the welt crease, there will be no danger of scarring the upper because its action is the same on different shoes irrespective of the size and exact c ontour of the upper and because the top of the roll is substantially in the plane of the welt crease.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for operating on prewelt shoe uppers, means for applying cement to the soleattachlng surface of the welt, welt-crease-entering meansfor supporting the welt in cooperative relationship to said applying means, molding means engaging the inside of the upper to hold the upper in engagement with said welt-creaseentering means, a movable support for the molding means, and means for positively holding said support in such a position that the said moldingmeans is locked in engagement with the upper: v,

,2. In a machine for operating on prewelt shoe uppers; a roll for applying cement tothe soleattaching surface of the. welt, a frusto-conical supporting roll rotatable about an axis angularly relatedto the axis of the first roll and with the base of'said roll supporting the welt in engagement with the cementing roll, an upper-entering finger for holding the work in engagement with the periphery of the supporting roll, and operator controlled means for withdrawing said'fingel to permit removal ofthe work.

3; In a machinefor operating on prewelt shoe uppers, a cement-applying roll the bottom of which is adapted for engagement with the attaching surface of. a welt secured to an upper held in inverted position, crease-entering means for supporting the welt in engagement withsaid roll, anuDPer-supporting member subtending a portion of. said cementing: roll and arranged to hold'the crease of the upper in firm engagement with thefsupporting means, a slide carrying said member, and operator-controlled means for moving said slideconstructed and arranged, in one position, to lock the lide in such position that the upper-supporting member holds the Work positvely against disengagement from the creaseentering means. i

.4.- In a machine for operating on preweltshoe uppers, a cementing roll, a supporting roll having a wedge-shaped periphery, aslideway, a slide therein, said slide having a groove angularly related to the direction of movement of the slide, a-finger supported by said slide for engagement .with theiinsideoi the upper to hold the welt crease against the supporting roll, acrank arm cooperating with said groove and adapted to rest in the, slidewaysubstantially normal to said groove to hold the finger in work-engaging -posi-- tion, and operator-controlled means for rotating said crank arm to move the slide to carry the tool away from the work, Y 7

- a 7 ERIC A. HOLMGREN. 

